/*
 * Tencent is pleased to support the open source community by making Hippy available.
 * Copyright (C) 2022 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package com.tencent.mtt.hippy.serialization.recommend;

import java.util.ArrayList;
import java.util.List;

/**
 * The {@link SharedValueConveyor} keep shared values while serializing
 *
 * This class is not directly constructible and is always passed to
 * Serializer and Deserializer.
 *
 * The user must keep the SharedValueConveyor instance until the associated
 * serialized data will no longer be deserialized.
 */
public final class SharedValueConveyor {
  /**
   * All shared values MUST be implement ${@link SharedValue} interface.
   */
  public interface SharedValue {
  }

  private final List<SharedValue> sharedObjects = new ArrayList<>();

  SharedValueConveyor() {
  }

  SharedValue getPersisted(int index) {
    return sharedObjects.get(index);
  }

  int persist(SharedValue value) {
    sharedObjects.add(value);
    return sharedObjects.size() - 1;
  }
}
